Process for preparing thermoplastic hydrogen-containing fluoropolymers
AssigneeAusimont S.p.A.
InventorsJulio A. Abusleme, Sheldon J. Kirsch
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Abstract
Cyclopentanes alkyl-substituted with one or more C.sub.1 -C.sub.6 alkyls are used as chain transfer agents in (co)polymerization reactions carried out, either in suspension or in aqueous emulsion, at low temperatures, comprised between -30.degree. and +30.degree. C., for preparing thermoplastic hydrogen-containing fluoropolymers , such as for instance ethylene/chlorotrifluoroethylene and ethylene/tetrafluoroethylene copolymers, or homopolymers and copolymers of vinylidenefluoride. They are transfer agents having high efficiency, which are liquid and thus can be easily handled and dosed, non-toxic, yielding alkyl end groups of high thermal stability.
Claims11
Process for preparing thermoplastic hydrogen-containing fluoropolymers, wherein the corresponding monomers are (co)polymerized at a temperature of from -30.degree. to +30.degree. C. in the presence, as chain transfer agent, of a cyclopentane alkyl-substituted with one or more alkyls C.sub.1 -C.sub.6.
Dependencies are inferred from the claim text.